20111122109 has 8 divisors (see below), whose sum is σ = 22798033440. Its totient is φ = 17587053936.

The previous prime is 20111122091. The next prime is 20111122123. The reversal of 20111122109 is 90122111102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20111122109 - 2⁸ = 20111121853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111122169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40710527 + ... + 40711020.

It is an arithmetic number, because the mean of its divisors is an integer number (2849754180).

Almost surely, 2^20111122109 is an apocalyptic number.

It is an amenable number.

20111122109 is a deficient number, since it is larger than the sum of its proper divisors (2686911331).

20111122109 is a wasteful number, since it uses less digits than its factorization.

20111122109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81421579.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 20111122109 in words is "twenty billion, one hundred eleven million, one hundred twenty-two thousand, one hundred nine".